Honeywell SYA14 Series Manual page 430

Installation Instructions for the
GKR/GKL Series Solenoid Key Operated Safety
Interlock Switch
IMPROPER INSTALLATION
• Consult with local safety agencies and their
requirements when designing a machine-control
link, interface and all control elements that affect
safety.
• Strictly adhere to all installation instructions.
Failure to comply with these instructions
could result in death or serious injury.
GENERAL INFORMATION
The MICRO SWITCH GK Solenoid Key Operated
Safety Interlock Switch is designed to lock protective
guards that prevent access to hazardous motion so
that dangerous machine operations can only take
place if the protective guard is closed and locked.
Likewise, the protective guard cannot be opened if
hazardous motion is present.
The control system must be designed so that
hazardous motion can only take place when the
protective guard is locked via the GKR/GKL Series
Solenoid Key Operated Safety Interlock Switch.
This control system design must ensure the guard
locking device releases only when the dangerous
conditions no longer exist (Figure 1).
Figure 1: Example Safety Related Control Circuit
INPUT
GKR/GKL
Key Operated
Solenoid Safety
Interlock Switch
Standard
Inputs
(Non-safety
Related)
* Honeywell FF-SR Series safety control modules may be used as an interface between protective safety
equipment and machine control circuitry. These products offer redundancy, monitoring, and control reliability
features that ensure the highest level of industrial safety.
MICRO SWITCH Sensing and Control
The guard locking device can be specified as
either Mechanical Lock or Solenoid Lock (see order
guide).
Mechanical Lock occurs by internal spring force
when the protective guard is closed and the key is
inserted. Applying voltage to the solenoid unlocks
the protective guard. When power failure occurs,
the protective guard can be unlocked by actuating
the auxiliary release.
Solenoid Lock occurs by applying voltage to the
solenoid after the protective guard is closed and the
key is inserted. Removing voltage to the solenoid
unlocks the protective guard.
CONTROL
Interface
Back Check
Primary
Safety Control
Hardware
( * )
Primary
Input
Secondary
Monitoring
Lines
Secondary
Monitoring
Line
PLC
Secondary
Control
PK 81591
MOTION
Primary
Hazardous
Control
Output
Machine
Motion
Primary
Logic
Non-hazardous
Control
Machine Motion
ISSUE 2